19-49035642-G-A

Position:

chr19-49035642-G-A

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BP4_Strong

The NM_033377.2(CGB1):c.436C>T(p.Leu146Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000455 in 1,611,234 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00059 ( 1 hom., cov: 27)

Exomes 𝑓: 0.00044 ( 1 hom. )

Consequence

CGB1
NM_033377.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.166

Variant links:

Genes affected

CGB1 (HGNC:16721): (chorionic gonadotropin subunit beta 1) The beta subunit of chorionic gonadotropin (CGB) is encoded by six highly homologous and structurally similar genes that are arranged in tandem and inverted pairs on chromosome 19q13.3, and contiguous with the luteinizing hormone beta (LHB) subunit gene. The CGB genes are primarily distinguished by differences in the 5' untranscribed region. This gene was originally thought to be one of the two pseudogenes (CGB1 and CGB2) of CGB subunit, however, detection of CGB1 and CGB2 transcripts in vivo, and their presence on the polysomes, suggested that these transcripts are translated. To date, a protein product corresponding to CGB1 has not been isolated. The deduced sequence of the hypothetical protein of 132 aa does not share any similarity with that of functional CGB subunits (PMID:8954017). However, a 155 aa protein, translated from a different frame, is about the same size, and shares 98% identity with other CGB subunits. [provided by RefSeq, Jul 2008]

CGB1 links:

ENSG00000267335 (HGNC:):

ENSG00000267335 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.02019021).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CGB1	NM_033377.2 link	c.436C>T	p.Leu146Phe	missense_variant	3/3	ENST00000301407.8	NP_203695.2	A6NKQ9-2
CGB1	NM_001382421.1 link	c.400C>T	p.Leu134Phe	missense_variant	3/3		NP_001369350.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
CGB1	ENST00000301407.8 link	c.436C>T	p.Leu146Phe	missense_variant	3/3	1	NM_033377.2	ENSP00000301407.6	A6NKQ9-2
ENSG00000267335	ENST00000591656.1 link	c.-28+884C>T		intron_variant		2		ENSP00000466140.1	K7ELM3
ENSG00000267335	ENST00000604577.1 link	c.9+1061C>T		intron_variant		1		ENSP00000474022.1	S4R385
CGB1	ENST00000601167.1 link	c.*11C>T		downstream_gene_variant		5		ENSP00000472896.2	K7ELM3

Frequencies

GnomAD3 genomes

AF:

0.000588

AC:

AN:

151442

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000245

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00141

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00100

Gnomad OTH

AF:

0.00144

GnomAD3 exomes

AF:

0.000463

AC:

116

AN:

250642

Hom.:

AF XY:

0.000420

AC XY:

AN XY:

135734

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00152

Gnomad NFE exome

AF:

0.000671

Gnomad OTH exome

AF:

0.00115

GnomAD4 exome

AF:

0.000441

AC:

644

AN:

1459792

Hom.:

Cov.:

AF XY:

0.000472

AC XY:

343

AN XY:

726190

show subpopulations

Gnomad4 AFR exome

AF:

0.0000300

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00152

Gnomad4 NFE exome

AF:

0.000482

Gnomad4 OTH exome

AF:

0.000432

GnomAD4 genome

AF:

0.000588

AC:

AN:

151442

Hom.:

Cov.:

AF XY:

0.000528

AC XY:

AN XY:

73924

show subpopulations

Gnomad4 AFR

AF:

0.0000245

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00141

Gnomad4 NFE

AF:

0.00100

Gnomad4 OTH

AF:

0.00144

Alfa

AF:

0.000528

Hom.:

Bravo

AF:

0.000366

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000581

AC:

ExAC

AF:

0.000437

AC:

EpiCase

AF:

0.000709

EpiControl

AF:

0.000415

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 17, 2021

The c.436C>T (p.L146F) alteration is located in exon 3 (coding exon 3) of the CGB1 gene. This alteration results from a C to T substitution at nucleotide position 436, causing the leucine (L) at amino acid position 146 to be replaced by a phenylalanine (F). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.47

CADD

Benign

3.7

DANN

Benign

0.84

Eigen

Benign

-0.60

Eigen_PC

Benign

-0.81

FATHMM_MKL

Benign

0.018

LIST_S2

Benign

0.49

M_CAP

Benign

0.0033

MetaRNN

Benign

0.020

MetaSVM

Benign

-1.1

PrimateAI

Benign

0.32

PROVEAN

Benign

-0.48

REVEL

Benign

0.037

Sift

Pathogenic

0.0

Sift4G

Benign

0.15

Polyphen

0.91

Vest4

0.13

MVP

0.23

MPC

1.3

ClinPred

0.089

GERP RS

1.5

gMVP

0.049

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over